No, you do not need to tweak them. I buy EPUBs from Kobo and many other sources. I import them into Sony Reader Library and transfer them to my ereader just the same as an EPUB purchased from the Sony Reader Store. You just have to authorize your Sony ereader to your Adobe Digital Editions account.

There is a list of ereaders that work with the Kobo store at the link below. Just keep in mind it hasn't been updated for the latest generation of Sony ereaders. The 350 / 650 / 950 will all work fine.http://www.kobobooks.com/ade

Yes, you can load them directly with no tweaking and they will load just fine. However, they tend to have wider margins. Some are worse than others. You can go into Options and change the "margin cut" and it will be a little better.

I was more concerned that Kobo transacts in U. S. dollars, or only Canadian with a credit card foreign transaction surcharge?

The prices are shown in USD when you are browsing and purchase. The currency fee shows up as a separate line item charge (at least for me) on your bill. The fee is not significant, and I usually purchase from Kobo with a coupon which more than makes up for it. As an example, the last book I purchased from Kobo was $4.10 with a $0.12 fee.

In the US, Borders is another bookstore option since they are powered by Kobo. However, their website interface really annoys me. I wish they'd make their website easy to navigate like kobobooks.com.

No, it's a foreign transaction fee credit cards companies usually charge, even if your transaction is in your own currency. For Canadian consumers, Kobo purchases are considered "domestic" transactions.

No, it's a foreign transaction fee credit cards companies usually charge, even if your transaction is in your own currency. For Canadian consumers, Kobo purchases are considered "domestic" transactions.